/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
static bool RetrieveViewportPaintRays ( const [FSceneView](API\Runtime\Engine\FSceneView) * View, [FViewport](API\Runtime\Engine\FViewport) * Viewport, [FPrimitiveDrawInterface](API\Runtime\Engine\FPrimitiveDrawInterface) * PDI, [TArray](API\Runtime\Core\Containers\TArray)< [FPaintRay](API\Editor\MeshPaint\MeshPaintHelpers\FPaintRay) > & OutPaintRays )